{
  "spore": "profile",
  "id": "toray-t300",
  "spore_version": "0.2",
  "family": "carbon-materials",
  "name": "Toray Torayca T300 carbon fibre",
  "abbreviation": "T300",
  "role": "reinforcing fibre (standard-modulus carbon fibre)",
  "category": "carbon",
  "type": "carbon-fiber",
  "summary": "Torayca T300 is Toray's standard-modulus carbon fibre. The Toray datasheet (Rev. 04/22/2025) prints a fibre tensile strength of 3530 MPa and a tensile modulus of 230 GPa, with a density of 1.76 g/cm3 and a strain at failure of 1.5 %. In a composite normalized to 60 % fibre volume and cured with #2500 epoxy at 130 °C, the same datasheet prints a tensile strength of 1820 MPa and a tensile modulus of 140 GPa (ASTM D3039). The NASA outgassing database lists an epoxy laminate of T300/M76 with a total mass loss of 0.6 in vacuum (the CSV prints no unit, so percent is assumed); that is a laminate value, not a fibre value.\n",
  "best_for": "Standard-modulus structural fibre for weaving, braiding, filament winding and prepreg, with a 230 GPa tensile modulus and a 3530 MPa fibre tensile strength (Toray datasheet)",
  "weakest_at": "Composite strength depends on the matrix: 1820 MPa in a #2500 epoxy composite against 3530 MPa for the fibre alone, both per the Toray datasheet",
  "identity": {
    "formula": "Carbon fibre, more than 93 % carbon by weight, with sodium plus potassium below 50 ppm (Toray datasheet); precursor type not printed on the sheets read",
    "designations": [
      {
        "system": "Trade name",
        "code": "T300",
        "note": "Toray product designation, 3,000-filament standard modulus; printed as TORAYCA T300 in the datasheet title",
        "source": "toray-t300-ds",
        "where": "Product Designation table, FIBER TYPE column"
      }
    ],
    "source": "toray-t300-ds",
    "where": "Title, Product Designation table and Chemical Composition row of the TORAYCA T300 datasheet"
  },
  "tags": {
    "environments": [],
    "stresses": [
      "vacuum-and-outgassing"
    ],
    "applications": [
      "structures"
    ]
  },
  "properties": [
    {
      "benchmark": "density",
      "label": "Density, Torayca T300 fibre",
      "value": 1.76,
      "bound": "exact",
      "unit": "g/cm3",
      "scope": "material",
      "conditions": {
        "form": "carbon fibre (fibre properties table)",
        "grade": "TORAYCA T300 standard modulus, 3,000 filaments"
      },
      "method": "Printed in the Fiber Properties table with Toray test method TY-030B-02, which is not described on the sheet",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Fiber Properties table, Density row",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "ultimate_tensile_strength",
      "label": "Tensile strength, T300 fibre",
      "value": 3530,
      "bound": "exact",
      "unit": "MPa",
      "scope": "material",
      "conditions": {
        "form": "carbon fibre (fibre properties table)",
        "english_as_printed": "512 ksi",
        "test": "Toray method TY-030B-01"
      },
      "method": "Printed in the Fiber Properties table. The Toray card prints the same value (512 Ksi, 3,530 MPa) and a footnote that its starred values are measured by the impregnated strand method.",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Fiber Properties table, Tensile Strength row (TY-030B-01)",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "elastic_modulus",
      "label": "Tensile modulus, T300 fibre",
      "value": 230,
      "bound": "exact",
      "unit": "GPa",
      "scope": "material",
      "conditions": {
        "form": "carbon fibre (fibre properties table)",
        "english_as_printed": "33.4 Msi",
        "test": "Toray method TY-030B-01"
      },
      "method": "Printed in the Fiber Properties table",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Fiber Properties table, Tensile Modulus row (TY-030B-01)",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "elongation",
      "label": "Strain at failure, T300 fibre",
      "value": 1.5,
      "bound": "exact",
      "unit": "%",
      "scope": "material",
      "conditions": {
        "form": "carbon fibre (fibre properties table)",
        "test": "Toray method TY-030B-01"
      },
      "method": "Printed in the Fiber Properties table",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Fiber Properties table, Strain at Failure row (TY-030B-01)",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "filament_diameter",
      "label": "Filament diameter, T300 fibre",
      "value": 7,
      "bound": "exact",
      "unit": "μm",
      "scope": "material",
      "conditions": {
        "form": "carbon fibre (fibre properties table)"
      },
      "method": "Printed in the Fiber Properties table with no test method on that row. The name filament_diameter is not in the property canon.",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Fiber Properties table, Filament Diameter row",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "tow_linear_density",
      "label": "Tow linear density, T300 3K tow",
      "value": 198,
      "bound": "exact",
      "unit": "g/1000m",
      "scope": "material",
      "conditions": {
        "tow": "3K (3,000 filaments), untwisted (B)",
        "other_rows_as_printed": "1K 66 g/1000m; 6K 396 g/1000m"
      },
      "method": "Printed in the Fiber Properties table, Yield row (TY-030B-03). The name tow_linear_density is not in the property canon.",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Fiber Properties table, Yield row, 3K line (TY-030B-03)",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "cte",
      "label": "Coefficient of thermal expansion, T300 fibre",
      "value": -0.41,
      "bound": "exact",
      "unit": "ppm/°C",
      "scope": "material",
      "conditions": {
        "form": "carbon fibre",
        "temperature_range": "not printed on the sheet",
        "direction": "not printed on the sheet"
      },
      "method": "Printed as alpha times 10-6 per °C in the Functional Properties table and written here as ppm/°C, the same unit. No test method is printed.",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Functional Properties table, CTE row",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "specific_heat",
      "label": "Specific heat, T300 fibre",
      "value": 0.777,
      "bound": "exact",
      "unit": "J/g·°C",
      "scope": "material",
      "conditions": {
        "form": "carbon fibre",
        "temperature": "not printed on the sheet"
      },
      "method": "Printed in the Functional Properties table with no test method",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Functional Properties table, Specific Heat row",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "thermal_conductivity",
      "label": "Thermal conductivity, T300 fibre",
      "value": 0.105,
      "bound": "exact",
      "unit": "J/cm·s·°C",
      "scope": "material",
      "conditions": {
        "form": "carbon fibre",
        "direction": "not printed on the sheet"
      },
      "method": "Printed in the Functional Properties table with the unit as Toray prints it, and no test method or direction",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Functional Properties table, Thermal Conductivity row",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "ultimate_tensile_strength",
      "label": "Tensile strength, T300 in",
      "value": 1820,
      "bound": "exact",
      "unit": "MPa",
      "scope": "material",
      "conditions": {
        "matrix": "#2500 epoxy, cured at 130 °C as printed",
        "fibre_volume": "normalized to 60 % fibre volume",
        "english_as_printed": "264 ksi",
        "test": "ASTM D3039"
      },
      "method": "Printed in the Composite Properties table. The table's footnote says the values are normalized to 60 % fiber volume and cured with #2500 epoxy at 130 °C.",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Composite Properties table, Tensile Strength row (ASTM D3039)",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "elastic_modulus",
      "label": "Tensile modulus, T300 in",
      "value": 140,
      "bound": "exact",
      "unit": "GPa",
      "scope": "material",
      "conditions": {
        "matrix": "#2500 epoxy, cured at 130 °C as printed",
        "fibre_volume": "normalized to 60 % fibre volume",
        "english_as_printed": "20 Msi",
        "test": "ASTM D3039"
      },
      "method": "Printed in the Composite Properties table with the same footnote as the tensile strength row",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Composite Properties table, Tensile Modulus row (ASTM D3039)",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "elongation",
      "label": "Tensile strain, T300 in",
      "value": 1.26,
      "bound": "exact",
      "unit": "%",
      "scope": "material",
      "conditions": {
        "matrix": "#2500 epoxy, cured at 130 °C as printed",
        "fibre_volume": "normalized to 60 % fibre volume",
        "test": "ASTM D3039"
      },
      "method": "Printed in the Composite Properties table with the same footnote as the tensile rows",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Composite Properties table, Tensile Strain row (ASTM D3039)",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "compressive_strength",
      "label": "Compressive strength, T300 in",
      "value": 1470,
      "bound": "exact",
      "unit": "MPa",
      "scope": "material",
      "conditions": {
        "matrix": "#2500 epoxy, cured at 130 °C as printed",
        "fibre_volume": "normalized to 60 % fibre volume",
        "english_as_printed": "213 ksi",
        "test": "SACMA SRM 1R-94"
      },
      "method": "Printed in the Composite Properties table. The name compressive_strength is not in the property canon.",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Composite Properties table, Compressive Strength row (SACMA SRM 1R-94)",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "flexural_strength",
      "label": "Flexural strength, T300 in",
      "value": 1790,
      "bound": "exact",
      "unit": "MPa",
      "scope": "material",
      "conditions": {
        "matrix": "#2500 epoxy, cured at 130 °C as printed",
        "fibre_volume": "normalized to 60 % fibre volume",
        "english_as_printed": "260 ksi",
        "test": "ASTM D790"
      },
      "method": "Printed in the Composite Properties table",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Composite Properties table, Flexural Strength row (ASTM D790)",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "flexural_modulus",
      "label": "Flexural modulus, T300 in",
      "value": 123,
      "bound": "exact",
      "unit": "GPa",
      "scope": "material",
      "conditions": {
        "matrix": "#2500 epoxy, cured at 130 °C as printed",
        "fibre_volume": "normalized to 60 % fibre volume",
        "english_as_printed": "18 Msi",
        "test": "ASTM D790"
      },
      "method": "Printed in the Composite Properties table",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Composite Properties table, Flexural Modulus row (ASTM D790)",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "interlaminar_shear_strength",
      "label": "Interlaminar shear strength (ILSS), T300 in",
      "value": 94.1,
      "bound": "exact",
      "unit": "MPa",
      "scope": "material",
      "conditions": {
        "matrix": "#2500 epoxy, cured at 130 °C as printed",
        "fibre_volume": "normalized to 60 % fibre volume",
        "english_as_printed": "14 ksi",
        "test": "SACMA SRM 8R-94"
      },
      "method": "Printed in the Composite Properties table. The name interlaminar_shear_strength is not in the property canon.",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Composite Properties table, ILSS row (SACMA SRM 8R-94)",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "in_plane_shear_strength",
      "label": "In-plane shear strength, T300 in",
      "value": 95,
      "bound": "exact",
      "unit": "MPa",
      "scope": "material",
      "conditions": {
        "matrix": "#2500 epoxy, cured at 130 °C as printed",
        "fibre_volume": "normalized to 60 % fibre volume",
        "english_as_printed": "14 ksi",
        "test": "ASTM D3518"
      },
      "method": "Printed in the Composite Properties table. The name in_plane_shear_strength is not in the property canon.",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Composite Properties table, In Plane Shear Strength row (ASTM D3518)",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "transverse_tensile_strength",
      "label": "90 degree tensile strength, T300 in",
      "value": 76,
      "bound": "exact",
      "unit": "MPa",
      "scope": "material",
      "conditions": {
        "matrix": "#2500 epoxy, cured at 130 °C as printed",
        "fibre_volume": "normalized to 60 % fibre volume",
        "english_as_printed": "11 ksi",
        "test": "ASTM D3039"
      },
      "method": "Printed in the Composite Properties table. The name transverse_tensile_strength is not in the property canon.",
      "status": "ground",
      "source": "toray-t300-ds",
      "where": "Composite Properties table, 90º Tensile Strength row (ASTM D3039)",
      "source_detail": {
        "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
        "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
        "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
        "year": 2025,
        "kind": "datasheet",
        "license": "manufacturer data sheet, linked not reproduced"
      }
    },
    {
      "benchmark": "total_mass_loss",
      "label": "Total mass loss in vacuum, T300/M76 epoxy laminate",
      "value": 0.6,
      "bound": "exact",
      "unit": "%",
      "scope": "material",
      "conditions": {
        "material": "carbon fibre epoxy laminate T300/M76 (ID GSC28291)",
        "environment": "vacuum, NASA outgassing test (TML column)"
      },
      "method": "Read from the NASA outgassing database CSV, which prints no unit row, so percent is assumed. This is a laminate value with the M76 resin, not a fibre value. The name total_mass_loss is not in the property canon.",
      "status": "ground",
      "source": "nasa-outgassing-db",
      "where": "Row CARBON FIBER EPOXY LAMINATE T300/M76 (GSC28291), column TML",
      "source_detail": {
        "title": "NASA outgassing database (legacy Outgassing_Db CSV)",
        "id": "NASA data.nasa.gov, legacy Outgassing_Db",
        "url": "https://data.nasa.gov/docs/legacy/Outgassing_Db/Outgassing_Db_rows.csv",
        "kind": "database",
        "license": "NASA public data"
      }
    },
    {
      "benchmark": "total_mass_loss",
      "label": "Total mass loss in vacuum, T300/954-6 composite laminate",
      "value": 0.13,
      "bound": "exact",
      "unit": "%",
      "scope": "material",
      "conditions": {
        "material": "carbon fibre composite laminate T300/954-6 (ID GSC29440)",
        "environment": "vacuum, NASA outgassing test (TML column)"
      },
      "method": "Read from the NASA outgassing database CSV, which prints no unit row, so percent is assumed. This is a laminate value with the 954-6 resin, not a fibre value.",
      "status": "ground",
      "source": "nasa-outgassing-db",
      "where": "Row CARBON FIBER COMPOSITE - T300/954-6 (GSC29440), column TML",
      "source_detail": {
        "title": "NASA outgassing database (legacy Outgassing_Db CSV)",
        "id": "NASA data.nasa.gov, legacy Outgassing_Db",
        "url": "https://data.nasa.gov/docs/legacy/Outgassing_Db/Outgassing_Db_rows.csv",
        "kind": "database",
        "license": "NASA public data"
      }
    },
    {
      "benchmark": "cvcm",
      "label": "Collected volatile condensable material, T300/M76 epoxy laminate",
      "value": 0.04,
      "bound": "exact",
      "unit": "%",
      "scope": "material",
      "conditions": {
        "material": "carbon fibre epoxy laminate T300/M76 (ID GSC28291)",
        "environment": "vacuum, NASA outgassing test (CVCM column)"
      },
      "method": "Read from the NASA outgassing database CSV, which prints no unit row, so percent is assumed. The name cvcm is not in the property canon.",
      "status": "ground",
      "source": "nasa-outgassing-db",
      "where": "Row CARBON FIBER EPOXY LAMINATE T300/M76 (GSC28291), column CVCM",
      "source_detail": {
        "title": "NASA outgassing database (legacy Outgassing_Db CSV)",
        "id": "NASA data.nasa.gov, legacy Outgassing_Db",
        "url": "https://data.nasa.gov/docs/legacy/Outgassing_Db/Outgassing_Db_rows.csv",
        "kind": "database",
        "license": "NASA public data"
      }
    }
  ],
  "corrosion": [
    {
      "environment": "Vacuum (space), total mass loss of T300 epoxy laminates",
      "headline": "NASA's outgassing database lists T300 epoxy laminates at 0.6 % and 0.13 % total mass loss in vacuum, and these are laminate values, not fibre values.",
      "effect": "Total mass loss is recorded for the whole laminate. The database does not separate the fibre from the resin, so the loss belongs to the M76 and 954-6 epoxy systems rather than to the T300 fibre alone.",
      "rating": "unknown",
      "conditions": {
        "basis": "two NASA outgassing database rows for T300 laminates; percent assumed because the CSV prints no unit row",
        "test": "total mass loss in vacuum as recorded in the database; the test standard is not printed in the CSV"
      },
      "source": "nasa-outgassing-db",
      "where": "Rows GSC28291 (T300/M76) and GSC29440 (T300/954-6), column TML"
    },
    {
      "environment": "Moisture over a wide temperature range (carbon fibre reinforced polymer)",
      "headline": "Wikipedia says moisture over a wide temperature range can degrade the mechanical properties of CFRP, with no figure given.",
      "effect": "The statement is about CFRP in general, not the T300 fibre or the #2500 epoxy composite. The article gives no temperature, humidity or property loss.",
      "rating": "unknown",
      "conditions": {
        "basis": "general statement with no test condition",
        "material": "CFRP in general, not T300 specifically"
      },
      "source": "wikipedia-carbon-fiber",
      "where": "Article text read by WebFetch on 2026-11-01 (the section is not named in the fetch result)"
    }
  ],
  "risks": {
    "hazards": [
      {
        "text": "The Toray Technical Manual (Rev. 4/2020) says that during processing, dust and broken filaments from carbon fiber can cause skin irritation and dermatitis, electrical hazards (carbon fiber is electrically conductive) and respiratory problems. The manual gives no GHS class for these.",
        "ghs": [],
        "source": "toray-tech-manual",
        "where": "Safety and Handling section (PDF page 16, printed page 12)"
      },
      {
        "text": "The Toray Carbon Fibers America safety data sheet for TORAYCA Carbon Fiber Sizing Type 4 (copy on RevChem, file dated 07/08/2018) states 'Non-hazardous material' in Section 2.1 and prints 'Short fiber, for example particles or fly, can cause transient skin irritation.' in Section 2.3. This is an SDS for sizing type 4, not for T300; no T300 SDS was found.",
        "ghs": [],
        "source": "toray-cfa-sds-sizing4",
        "where": "Section 2.1 (Non-hazardous material) and Section 2.3 (health effects)"
      }
    ],
    "failure_risks": [],
    "side_effects": [],
    "handling": [
      {
        "text": "The Toray datasheet says: Please refer to SDS for handling and disposal. The SDS was not read in this run, so no hazard classification is recorded.",
        "source": "toray-t300-ds",
        "where": "Footer note under the Packaging table"
      },
      {
        "text": "The Toray Carbon Fibers America data sheet No. CFA-001 refers the reader to 'Section 4 for Safety & Handling information' and says the properties are for material selection only.",
        "source": "toray-cfa-001",
        "where": "Footer notes below the Composite Properties table"
      }
    ],
    "mitigations": [
      {
        "text": "The Toray manual advises local removal of dust at the point of generation, which it calls highly effective. Personnel should wear goggles, facemasks, gloves and protective clothing wherever dust generation is significant, and electrical equipment should be isolated.",
        "source": "toray-tech-manual",
        "where": "Safety and Handling section (PDF page 16, printed page 12)"
      }
    ]
  },
  "uses": [
    {
      "application": "structures",
      "device": "Composite parts made by weaving, braiding, filament winding or prepreg",
      "example": "Toray calls T300 a baseline carbon fibre with a 40-year production history, with excellent processability in weaving, braiding, filament winding and prepreg methods.",
      "source": "toray-t300-ds",
      "where": "Product Notes, first paragraph"
    },
    {
      "application": "structures",
      "device": "Carbon-fibre structures in aerospace, ships, automotive, civil engineering and sports equipment",
      "example": "Wikipedia lists aerospace, superstructures of ships, automotive, civil engineering and sports equipment as carbon-fibre applications in general; it does not name T300 for any of them.",
      "source": "wikipedia-carbon-fiber",
      "where": "Applications list in the article text"
    }
  ],
  "supply": [
    {
      "subject": "Carbon fibre precursors (polyacrylonitrile, rayon, petroleum pitch)",
      "producers": [],
      "critical_lists": [],
      "substitutes": [],
      "source": "wikipedia-carbon-fiber",
      "where": "Precursor paragraph of the article text"
    },
    {
      "subject": "Toray TORAYCA T300 manufacturing sites",
      "producers": [],
      "critical_lists": [],
      "substitutes": [],
      "source": "toray-t300-ds",
      "where": "Product Notes, first paragraph"
    },
    {
      "subject": "Standard spool size for T300 (packaging, not supply)",
      "producers": [],
      "critical_lists": [],
      "substitutes": [],
      "source": "toray-card",
      "where": "Typical fiber properties table, Spool Size column, T300 row"
    },
    {
      "subject": "TORAYCA carbon fibre production sites and capacity (Toray Industries)",
      "producers": [],
      "critical_lists": [],
      "substitutes": [],
      "source": "toray-tech-manual",
      "where": "Opening text of the manual (PDF page 4), paragraphs on TORAYCA fiber development and Toray's leadership"
    }
  ],
  "media": [],
  "documents": [
    {
      "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet (Rev. 04/22/2025)",
      "type": "datasheet",
      "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
      "year": 2025
    },
    {
      "title": "Toray TORAYCA typical fiber properties card",
      "type": "datasheet",
      "url": "https://www.toraycma.com/wp-content/uploads/Carbon-Fiber-Card.pdf"
    },
    {
      "title": "NASA outgassing database (legacy Outgassing_Db CSV)",
      "type": "database",
      "url": "https://data.nasa.gov/docs/legacy/Outgassing_Db/Outgassing_Db_rows.csv"
    },
    {
      "title": "NIST Atomic Weights and Isotopic Compositions, carbon",
      "type": "database",
      "url": "https://physics.nist.gov/cgi-bin/Compositions/stand_alone.pl?ele=C&all=all&ascii=html"
    },
    {
      "title": "TORAYCA Technical Manual, Revision 4/2020",
      "type": "report",
      "url": "https://www.toraycma.com/wp-content/uploads/Torayca-Technical-Manual_4-28-2020.pdf",
      "year": 2020
    },
    {
      "title": "Toray Carbon Fibers America SDS, Carbon Fiber TORAYCA Sizing Type 4 (file dated 07/08/2018)",
      "type": "sds",
      "url": "https://www.revchem.com/?p=30838",
      "year": 2018
    },
    {
      "title": "Toray T300 Data Sheet No. CFA-001 (copy on Rockwest Composites)",
      "type": "datasheet",
      "url": "https://www.rockwestcomposites.com/downloads/Toray-T300.pdf"
    }
  ],
  "gaps": [
    "The T300 product safety data sheet from Toray was not found. The hazard entries use the Toray Technical Manual (Rev. 4/2020) and a Toray Carbon Fibers America SDS for sizing type 4, which is a different product.",
    "The older Toray Carbon Fibers America sheet CFA-001 (copy on Rockwest Composites) prints a composite tensile strength of 1,860 MPa and a tensile modulus of 135 GPa on a Toray 250 F epoxy. Those values are not used here. The Rev. 04/22/2025 sheet prints 1820 MPa and 140 GPa on",
    "Producer shares by country for carbon fibre were not found in a source read in this run, so the producers list stays empty.",
    "The PAN share of world carbon fibre production was not verified. An open review seen in search results could not be fetched.",
    "The precursor polymer for T300 (PAN, rayon or pitch) is not printed on the sheets read; Wikipedia names the options only.",
    "No CAS number for the T300 fibre was read.",
    "No temperature for thermal oxidation or heat ageing of T300 in air was read.",
    "No galvanic corrosion data for T300 with aluminium or other metals were read.",
    "UV, chemical resistance and humidity ageing data for the fibre were not read. The only moisture statement is a general one about CFRP on Wikipedia.",
    "No flight, satellite or launcher record for T300 was read in this run. The only space data are NASA outgassing rows for T300 laminates.",
    "No producer shares, country production figures, critical-mineral listings or substitutes for carbon fibre were read. No USGS commodity was checked for T300.",
    "Failure-mode data (fracture, fatigue, impact) for T300 were not read. Strain at failure is recorded under properties.",
    "The datasheet values are lot averages, and the sheet says they are not intended for specification. Test codes TY-030B-01, -02 and -03 are Toray's own and are not described on the sheet.",
    "No image file was read, so no media entries were added.",
    "Electric resistivity is printed as 1.7 x 10-3 Ω·cm in the datasheet, but the value could not be matched to the printed text by the value check (exponent form), so the property was left out.",
    "Properties not in the property canon and named in snake_case: filament_diameter, tow_linear_density, compressive_strength, interlaminar_shear_strength, in_plane_shear_strength, transverse_tensile_strength, total_mass_loss and cvcm.",
    "Thermal conductivity is printed in J/cm·s·°C with no direction or test method. The unit is kept as printed.",
    "The NASA outgassing CSV has no unit row, so percent for TML and CVCM is assumed, as the NASA convention.",
    "The NASA rows are for laminates with named resin systems (M76 and 954-6), not for the T300 fibre alone."
  ],
  "story": {
    "why": "Torayca T300 is a standard-modulus carbon fibre from Toray. The datasheet prints a fibre tensile strength of 3530 MPa (512 ksi) and a tensile modulus of 230 GPa (33.4 Msi), with a density of 1.76 g/cm3. Toray calls it a baseline fibre with a 40-year production history, used in weaving, braiding, filament winding and prepreg. The composite values are for a #2500 epoxy cured at 130 °C and normalized to 60 % fibre volume.",
    "uses": [
      {
        "where": "Composite structures",
        "line": "The Toray datasheet says T300 works well in weaving, braiding, filament winding and prepreg manufacturing."
      },
      {
        "where": "Aerospace and other structures",
        "line": "Wikipedia lists aerospace, ship superstructures, automotive, civil engineering and sports equipment among carbon-fibre applications. It does not name T300 for any of them."
      },
      {
        "where": "Space, laminate outgassing only",
        "line": "NASA's outgassing database lists T300 epoxy laminates with total mass loss in vacuum of 0.6 % (T300/M76) and 0.13 % (T300/954-6). These are laminate records. No flight record for T300 was read in this run."
      }
    ],
    "can_do": [
      {
        "label": "Strength",
        "line": "The fibre tensile strength is 3530 MPa (512 ksi), per the datasheet. In the composite normalized to 60 % fibre volume and cured with #2500 epoxy at 130 °C, the tensile strength is 1820 MPa under ASTM D3039.",
        "benchmark": "ultimate_tensile_strength",
        "scope": "material",
        "value": "3530 MPa fibre"
      },
      {
        "label": "Stiffness",
        "line": "The fibre tensile modulus is 230 GPa (33.4 Msi). The composite tensile modulus on the same matrix and fibre-volume basis is 140 GPa.",
        "benchmark": "elastic_modulus",
        "scope": "material",
        "value": "230 GPa fibre"
      },
      {
        "label": "Density",
        "line": "The datasheet prints a density of 1.76 g/cm3 for the fibre.",
        "benchmark": "density",
        "scope": "material",
        "value": "1.76 g/cm3"
      },
      {
        "label": "Strain at failure",
        "line": "The fibre fails at a printed strain of 1.5 %. The composite strain in the same test is 1.26 %.",
        "benchmark": "elongation",
        "scope": "material",
        "value": "1.5 %"
      }
    ],
    "compare": "Torayca T300 is the standard-modulus fibre in this comparison set. Its fibre tensile modulus is 230 GPa and its tensile strength is 3530 MPa, with a density of 1.76 g/cm3. The sheets read do not include other Toray grades, so this profile does not rank T300 against them. Read the table rows as one fibre's values, not as a ranking.",
    "compare_rows": [
      {
        "label": "Fibre tensile modulus",
        "benchmark": "elastic_modulus",
        "scope": "material"
      },
      {
        "label": "Fibre tensile strength",
        "benchmark": "ultimate_tensile_strength",
        "scope": "material"
      },
      {
        "label": "Density",
        "benchmark": "density",
        "scope": "material"
      }
    ],
    "handling": [
      "Read the supplier safety data sheet before handling or disposal. The Toray datasheet refers to it, and it was not read in this run.",
      "Specify the resin system with the fibre. The composite values depend on the matrix, which the datasheet gives as #2500 epoxy cured at 130 °C.",
      "Treat the printed values as lot averages for material selection, not as specification limits, as the datasheet states."
    ],
    "good_for": [
      "Composite structures made by weaving, braiding, filament winding or prepreg, per the Toray datasheet.",
      "Stiffness and strength at standard modulus: a 230 GPa fibre tensile modulus and a 3530 MPa fibre tensile strength.",
      "A carbon fibre with fibre and composite values printed on one datasheet, with the test standard named for the composite rows."
    ],
    "watch_out": [
      "Matrix effect: the composite tensile strength is 1820 MPa, against 3530 MPa for the fibre alone, in the datasheet's test.",
      "Outgassing: the T300/M76 laminate loses 0.6 % of its mass in vacuum (NASA). That is a laminate value and depends on the resin.",
      "Lot averages: the datasheet says its data are not intended for specification.",
      "Missing data: no hazard classification, precursor, supply share or heat-ageing temperature was read for T300."
    ],
    "verdict": "The Toray datasheet gives fibre and composite values with test methods. Hazard, supply, ageing and flight data are missing from this profile and are listed in gaps.",
    "recipe": {
      "line": "Torayca T300 is a carbon fibre, made mostly of carbon. The Toray datasheet prints a carbon content above 93 % and sodium plus potassium below 50 ppm. Carbon fibre starts from a precursor polymer (polyacrylonitrile, rayon or petroleum pitch) whose filament yarns are heated to drive off non-carbon atoms, according to Wikipedia. The T300 precursor is not printed on the sheets read, so it is not stated here.",
      "parts": [
        {
          "name": "Carbon",
          "symbol": "C",
          "role": "The main constituent. The stiff filament is built from carbon.",
          "share_note": "more than 93 % by weight (Toray datasheet, Chemical Composition row); NIST standard atomic weight interval [12.0096, 12.0116]"
        },
        {
          "name": "Sodium and potassium (impurities)",
          "symbol": "Na + K",
          "role": "Trace impurities printed on the datasheet. The sheet gives no role for them.",
          "share_note": "below 50 ppm (Toray datasheet)"
        }
      ]
    },
    "risk_groups": [
      {
        "title": "For people",
        "lead": "No hazard classification was read for T300. The Toray datasheet refers the reader to the safety data sheet for handling and disposal, and that SDS was not read in this run.",
        "points": [
          {
            "label": "Handling",
            "line": "Use the supplier SDS for the lot in hand before handling or disposal."
          },
          {
            "label": "Packaging",
            "line": "The datasheet's packaging table lists 3K tow in bobbins with a net weight of 2.0 kg, and the card lists a standard spool of 2.0 kg."
          }
        ],
        "level": 1,
        "verdict": "Not assessed in this run"
      },
      {
        "title": "If it fails",
        "lead": "The only failure-related value read is the fibre's strain at failure, 1.5 %.",
        "points": [
          {
            "label": "Fracture strain",
            "line": "The fibre's strain at failure is 1.5 % per the datasheet, against a fibre tensile strength of 3530 MPa."
          }
        ],
        "level": 2,
        "verdict": "Fracture data not found; see gaps."
      }
    ]
  },
  "updated": "2026-11-01",
  "review": {
    "status": "draft",
    "method": "assistant",
    "checked_values": 21,
    "unreachable": 0,
    "caveats": 3,
    "note": "Written by an AI assistant on 2026-11-01 from the Toray datasheet and card, the NASA outgassing CSV, Wikipedia and NIST, all read in this run. 21 values read. Caveats: datasheet values are lot averages; NASA rows are laminates, not fibre; percent is assumed for the CSV. Deepen pass 2026-11-02: added the Toray Technical Manual (Rev. 4/2020) for hazards, mitigations and production sites, a Toray Carbon Fibers America SDS for sizing type 4 for hazards, and the CFA-001 data sheet for handling. Open ageing papers were not found."
  },
  "sources": {
    "toray-t300-ds": {
      "title": "TORAYCA T300 Standard Modulus Carbon Fiber Data Sheet",
      "id": "Toray Carbon Fibers, TORAYCA T300 datasheet, Rev. 04/22/2025",
      "url": "https://www.toraycma.com/wp-content/uploads/T300-Data-Sheet.pdf",
      "year": 2025,
      "kind": "datasheet",
      "license": "manufacturer data sheet, linked not reproduced"
    },
    "toray-card": {
      "title": "Toray TORAYCA typical fiber properties card (nominal values)",
      "id": "Carbon-Fiber-Card.pdf, Toray Carbon Fibers",
      "url": "https://www.toraycma.com/wp-content/uploads/Carbon-Fiber-Card.pdf",
      "kind": "datasheet",
      "license": "manufacturer card, linked not reproduced"
    },
    "nasa-outgassing-db": {
      "title": "NASA outgassing database (legacy Outgassing_Db CSV)",
      "id": "NASA data.nasa.gov, legacy Outgassing_Db",
      "url": "https://data.nasa.gov/docs/legacy/Outgassing_Db/Outgassing_Db_rows.csv",
      "kind": "database",
      "license": "NASA public data"
    },
    "wikipedia-carbon-fiber": {
      "title": "Carbon fiber, Wikipedia",
      "id": "English Wikipedia article, text read on 2026-11-01",
      "url": "https://en.wikipedia.org/wiki/Carbon_fiber",
      "kind": "web",
      "license": "CC BY-SA 4.0, linked not reproduced"
    },
    "nist-atomic-weights": {
      "title": "NIST Atomic Weights and Isotopic Compositions, carbon",
      "id": "NIST standard atomic weight of C: [12.0096, 12.0116]",
      "url": "https://physics.nist.gov/cgi-bin/Compositions/stand_alone.pl?ele=C&all=all&ascii=html",
      "kind": "database",
      "license": "US government data"
    },
    "toray-tech-manual": {
      "title": "TORAYCA Technical Manual",
      "id": "Torayca Technical Manual, Revision 4/2020",
      "url": "https://www.toraycma.com/wp-content/uploads/Torayca-Technical-Manual_4-28-2020.pdf",
      "year": 2020,
      "kind": "handbook",
      "license": "manufacturer manual, linked not reproduced"
    },
    "toray-cfa-sds-sizing4": {
      "title": "Toray Carbon Fibers America SDS, Carbon Fiber TORAYCA Sizing Type 4",
      "id": "RevChem copy, file header dated 07/08/2018, Section 1.1 names Toray Carbon Fibers America, Inc.",
      "url": "https://www.revchem.com/?p=30838",
      "year": 2018,
      "kind": "datasheet",
      "license": "safety data sheet, third-party copy, linked not reproduced"
    },
    "toray-cfa-001": {
      "title": "Toray T300 Data Sheet No. CFA-001 (Toray Carbon Fibers America)",
      "id": "CFA-001, copy hosted by Rockwest Composites",
      "url": "https://www.rockwestcomposites.com/downloads/Toray-T300.pdf",
      "kind": "datasheet",
      "license": "manufacturer data sheet, linked not reproduced"
    }
  },
  "license": "CC-BY-4.0",
  "url": "https://spacemushroom.com/profiles/toray-t300/"
}